The Study On Grouting Geotechnical Prestressed Anchor Engineering Non-destructive Testing And Its Application

In recent years, with the development of geotechnical anchoring technique,especially the rapid development of the geotechnical prestressed anchor technology, topromote the progress of the entire civil engineering technology. The mountain roadconstruction, geotechnical prestressed anchor works as an effective measure of the slopeprotection and reinforcement in highway construction in China has been widelyused. However, for the hidden project, the quality and safety monitoring tools is laggingbehind. Engineering, substandard quality of works means landslides and othergeological disasters may occur at any time, a serious threat to the long-term operation ofthe highway project and people’s lives and property.Currently, the detection of the quality of the grouting of prestressed anchorengineering, we use overhead pull-out test method general. As technology advances, thedrawing method can no longer meet the needs of engineering quality and safetytesting. Under such circumstances, non-destructive testing of new technologies tobecome the most promising approaches.This paper first introduces the geotechnical prestressed anchoring technology,reviewed the quality control measures and technology development. In order to breakthrough the bottleneck, the paper from the grout and the optimization of raw materials,grout performance test and grouting process various research grouting technology, whileuse of Fluent to simulate the flow of slurry in the channels a general understanding ofgrouting defects that may exist circumstances.Through the introduction of the nature of the elastic stress wave, theestablishment of a mathematical model of elastic stress wave propagation in theanchorage system, and by the steady-state sinusoidal excitation was solved by theanalytical solution of the transient excitation on top of the complete bolt At the sametime, the dynamic response of the surrounding rock system on a complete bolt anddefective bolt in semi-analytical solution were calculated and provided an importanttheoretical basis for anchoring the detection of the quality of engineeringGrouting. Expounded the theory based on time-frequency signal analysis methods,several methods are compared, from which to select the best characterization of thesound frequency of stress wave energy distribution in the time-frequency space law, proposed several of the evaluation of quality of anchor engineeringGrouting parameters.Combination of the above detection principle and data interpretation methods,were tested on the highway slope anchor engineering grouting quality, and promote theapplication to the grouting of prestressed bridge channel detection, which summed up aviable acoustic stress wave detection technical and quality evaluation methods.This study can effectively avoid the detection of slope excavation detrimental to slopefailure can be quickly and effectively identify the security risks of the slope, bridgeprojects, for road construction and operation of major social significance and economicsignificance.